Image quality improving member and liquid crystal display device
View Patent ↗An image quality improving member comprising: a uniaxial anisotropic optical lens having a refractive index distribution in a first direction orthogonal to an optical axis of incident light, the optical lens condensing light vibrating in the first direction in the incident light; a translucent first substrate in which a black matrix including a plurality of first openings transmitting light output from the optical lens is formed; and a first polarizing plate disposed on the first substrate, the first polarizing plate having an absorption axis in a second direction orthogonal to the first direction when viewed from a direction of the optical axis.
1. An image quality improving member comprising:
a uniaxial anisotropic optical lens having a refractive index distribution in a first direction orthogonal to an optical axis of incident light, the optical lens condensing light vibrating in the first direction in the incident light;
a translucent first substrate in which a black matrix including a plurality of first openings transmitting light output from the optical lens is formed; and
a first polarizing plate disposed on the first substrate, the first polarizing plate having an absorption axis in a second direction orthogonal to the first direction when viewed from a direction of the optical axis.
2. The image quality improving member according to claim 1 , wherein the optical lens is a liquid crystal lens including liquid crystal molecules, and
arrangement of the liquid crystal molecules is fixed.
3. The image quality improving member according to claim 1 , wherein an aperture ratio of the black matrix is less than or equal to 30%.
4. The image quality improving member according to claim 1 , wherein
in two first openings disposed adjacent to each other among the plurality of first openings,
a color filter of a first color is disposed in one of the two first openings, and
a color filter of a second color different from the first color is disposed in the other first opening,
the optical lens includes a first lens unit that condenses light vibrating in the first direction toward the one of the two first openings and a second lens unit that condenses light vibrating in the first direction toward the other first opening, and
the first lens unit and the second lens unit have different focal lengths when light having an identical wavelength is incident.
5. The image quality improving member according to claim 4 , wherein the first lens unit and the second lens unit are different from each other in a thicknesses.
6. The image quality improving member according to claim 4 , wherein the first lens unit and the second lens unit are different from each other in the arrangement of the liquid crystal molecule.
7. The image quality improving member according to claim 1 , wherein
the black matrix is disposed on a first main surface of the first substrate opposed to the optical lens, and
the first polarizing plate is disposed on a second main surface on a side opposite to the first main surface.
8. A liquid crystal display device comprising:
a backlight that emits collimated light;
a liquid crystal panel including a liquid crystal layer on which the collimated light is incident; and
the image quality improving member according to claim 1 on which the collimated light transmitted through the liquid crystal layer is incident as the incident light.
9. The liquid crystal display device according to claim 8 , wherein the image quality improving member further includes a quarter-wave phase difference plate in which a plurality of second openings are formed at positions overlapping the plurality of first openings formed in the black matrix when viewed from the direction of the optical axis, the quarter-wave phase difference plate being disposed between the black matrix and the first polarizing plate.
10. The liquid crystal display device according to claim 8 , wherein
the image quality improving member further includes a first quarter-wave phase difference plate disposed between the black matrix and the first polarizing plate,
the liquid crystal panel is a Vertical Alignment (VA)-mode liquid crystal panel, and includes a translucent second substrate disposed between the liquid crystal layer and the backlight, a second polarizing plate disposed on a side of the backlight of the second substrate, and a second quarter-wave phase difference plate disposed between the second substrate and the second polarizing plate, and
a slow axis of the first quarter-wave phase difference plate and a slow axis of the second quarter-wave phase difference plate are orthogonal to each other when viewed from the direction of the optical axis.
11. The liquid crystal display device according to claim 8 , wherein the backlight independently emits first light, second light, and third light having different emission colors.